Gun with laterally-adjustable barrel



R. SCHURMANN. GUN WITH LATERALLY ADJUSTABLE BARREL,

APPLICATION FILED SEPT 7| 1920.

Patented Sept. 12, 1922,A

3 SHEETS-SHEET I.

LR. SCHURMANN. GUN WITH LATERALLY ADJUSTABLE BARREL. APPLlCATlUN FILED SEPT. 7 1920.

1 ,428,6 1 1 Patente Sept. 12, 1922.

3 SHEETS-SHEET 2.

n. SCHURMANN. GUN WITH LATERALLY ADJUSTABLE BARRELf APPLICATION FILED SEPT. 7| 1920 Patentedspt. 12, 1922.A

3 SHEETS-SHEET 3.

- K k 117 N the `hand wheel F, the gun barrel A and (by means of the above mentioned shaft connection and the gearing H g2) the sighting telescope J are adjusted through the saine angle but in the opposite direction and by rotatingthe hand wheel E the gun barrel and the sighting e telescopev J are mutually adj usted and inthe same direction vertically;

The construction and arrangement oi t-he parts of the gun so tar: described are known and do ynot form part'oif` this invention,

According to the present invention the traversing gear'for 'swinging the slide .rou-nd! about theaxis or the pin 7i yconsists or a series of worm teeth 717V on the rib, 792 concentric with this pin 7)V a worm 7c engaging VwithA the said worm teeth on the rib b2 and mount'- ed on a hollow shaft K and two operating .devices for the worm 7a.

The first operating device see particularly Figures 3 and 4) for the worm 7c" consists substantially Vot' a shaft M mounted on thev upper' carriage l and carrying` a hand wheel/fn and a worm, m2, la worm wheel n gearing into the worin m2 and mounted on the endof a traverse shaft N likewise carried on the upper carriage G and two Spur 'wheels' n2, which yare mounted to rotate i loosely on two crank pins n? on the shaft N stantially oifl a hand wheel p likewise mounted 4on the upper carriage, a' shaft P,

a'worin p32, a wheel Q provided :with a series ol worm teeth g and an internal series of spur teeth, the spur wheelsn2 gearing into the internal teeth Q2' and the spur wheel 7a2 on the hollow shaft K co-operating with the spur wheels n2. The two worm gears m2 n and VZ22 Q are self-locking; Y

,Upon the end or' the shaft N next to the wheel Q is mounted a bevel wheel at, which gears with va second bevel wheel r', the shaft R `or which islikewise pivotally mounted on the upper carriage C( j The sighting telescope J,`wliieh is mounted on a part J which acts as a bearing "for it on the coverof a'liollow cylindrical enlargement'g3 of themeinber g is provided with a pin 2, 'whichfrotates in a vertical aperture inthe cover of the enlargement g3 and 'is provided with a worinwheel 3. placed inside @the hollow 4cylindricalenlargement. Viththe'worin wheel 1735 gears a Worin s the The lateral angular position target on the rotation or the hand wheel p shaft S or which is rotatably mounted in the wall of the cylindrical enlargement g3. The shaft S carries on its rreeend a bevel wheel s2wvith which aV second bevel wheel t 'cooperates. The bevel Wheel t* is mounted on the lree end of a shaft T likevvisemounted on 'the enlargement g3 land positively conlnected by av jointedfandvvtelescopically ein tensible shaft connectionl T2 T3 with the bevel wheel rf. The whole of the arrangement and the ratio or transmission of the gears at r T3 T2A T t S2r S 8 3 and n2 702 K 7c 797 are i so arranged that when' the handfwhe'elfm is rotated the gun barrel A and the sighting telescope J rotate through the same angle but in the oppositedirection, about the axes orthevertical pins and 2. g

The manner, in which the'g'un above vdescribed isfelevated to correspond to the Vposi- 'Y tion and'range of the target by turning the hand wheels E and F, is already known and need not therefore be especially described.

ln order to adjust the sighting line and the longitudinal axis ,of the gun barrel A in a lateral'direction e. g, to a laterally moving target,l the operating device operated by thehand wheelp of the traversing gear is employed. Y Y Y When the said operating device is rotated, the slide B and with it also the gun barrelA is rotatedabout the axis of the vertical pin 7) relatively to the upper carriage C' by nieans' oit the gearing P p2 Q Q g2 a2 702 Kili 727, thel shaft N 'remaining stationary by, reason or i' the automatic locking of the gearing m2 n. This traversing movement or the gun :barrel A is takenl up bythe 'sighting line,.as the sighting telescope J which Vdetermines the direction'oi'the sightinglinetis arranged ,on i

the arm B3 mounted onv the slideB. As soon as therefore the sighting line points to the thehlongitudinal axis of the gun barrel A.V is also pointed in a lateral direction. on the target. 'f

vln order to transmit to the gun bari'eldthe adjustment corresponding `to the lateral deviation or drift of the projectile for eX- ample, the hand wheel/m is employed.`

Y Vhen this hand wheel m is rotated, the slide :B and with it thev gun barrelr A and the sighting device mounted on the arm B3 will be rocked by means of the gearing M m2 it N n3 n2 702 Krk 57 about the axisolithe vver@ y tical pin b relatively to the upper rcarriage the wheel Q remaining stationary by reason or the automatic locking ol the gear p2 Q. The movement ol'Y the shaft N; is simultaneously transmitted by means oit the gearing at r R T3.T2 T T5 82S s :i3 to the sighting telescope J in such away that it rotates 'about' the axis of the vertical pini? through the same angle but in the 'opposite direction to the gun barrel. 1n consequence i thereof -thesighting line remains parallel with its former position, while the gun barrel has imparted to it the adjustment which corresponds to the drift of the projectile.

The reading ofi takes place on the angle graduation (not shown) arranged on the shaft M and the corresponding reading off mark.

As will be quite clear without further description, the hand wheel m can also be used when tiring at laterally moving targets to lay the point of impact of the projectile laterally in front of the target to correspond to the speed of movement of this latter.

As the sighting line remains parallel with its foi-mer position during the adjusting movements ol the gun barrel to correspond to the dritt of the projectile or a lateral shifting' ot the point of impact of the projectile, it never loses its direction on the target when the gun barrel is being adjusted laterally, and it is therefore impossible for the target to get out of the field ot view of the telescope. The said tact enables moreover, under otherwise equal conditions the time required for the lateral adjusting operation to be considerably reduced and the rate of fire ot the. gun to be consequently increased, which fact is of great importance particu larly when firing at moving targets.

Claims:

l. In a gun having a gun barrel adjusta ble in lateral direction, a traversing gear for laterally adjusting the gun barrel and a driving member for operating the traversing gear, the combination with a sighting device arranged to partake on each lateral adjustment of the gun barrel and comprising a sighting means carrier adjustable in lateral direction relatively to the gun barrel and a gear for effecting the lateral adjustment of the sighting means carrier of means positively connecting the driving member of said traversing gear to said sighting means adjusting gear, whereby the gun barrel and the sighting' means carrier may be rotated through the same angle but in opposite direction when said driving member of the traversing gear is operated.

2. In a gun having a gun barrel adjustable in lateral direction and a traversing gear for laterally adjusting the gun barrel, a sigliting device arranged to partake on each lateral adjustment of the gun barrel and comprising a sighting means carrier adjustable in lateral direction 'relatively to the gun barrel and a gear foreliiecting the lateral adjustment ot the sighting means carrier, two drivingmembers for operating said traversing gear independently of each other and means positively connecting' said sighting means adjusting gear to one ot said driving members, whereby the gun barrel and the sighting means carrier may be rotated through the same angle but in opposite direction when the driving member positively connected to the sighting means adjusting gear is operated and the other driving members is held stationary.

` 3. In a gun having a gun barrel adjustable in lateral direction and a traversing gear for laterally adjusting the gun barrel, a sighting device arranged to partake on each lateral adjustment of the gun barrel and comprising a-sighting means carrier adjustable in lateral direction relatively to the gun barrel and a gear for eecting the lateral adjustment of the sighting means carrier, two driving members for operating said traversing gear, means positively connecting said sighting means adjusting gear to one of said driving members, a planet-ary gearing having two coaxial central wheels adapted to be rotated independently of each other, a bridge member rotatable about the same axis as said central wheels and planetary wheels carried by said bridge member and engaging said central wheels, means positively connecting each of said driving members to one of the three first-named members of the planetary gearing and means positively connecting the third member to the traversing gear of the gun barrel, whereby the gun barrel and the sighting means carrier may be rotated through the same angle but in opposite direction when the driving member positively connected to the sighting means adjusting gear is operated and the other driving member is held stationary.

a. In a gun having a gun barrel adjustable in lateral direction and a traversing gear for laterally adjusting the gun barrel, a sighting device arranged to partake on each lateral adjustment of the gun barrel and comprising a sighting means carrier adjustable in lateral direction relatively to the gun barrel and a gear for effecting the lateral adjustment of the sighting means carrier, two driving members for operating said traversing gear, a planetary gearing having two coaxial central wheels adapted to be rotated independently of each other, a bridge member rotatable about the same axis as said central wheels and planetary wheels carried by said bridge member and engaging said central wheels, means positively connecting said bridge member to one of said driving members and to the sighting means adjusting gear and means positively connecting the other driving member to one of said central wheels and the traversing gear of the gun barrel to the other centra-l wheel, whereby the gun barrel and the sighting means carrier may be rotated through the same angle but in opposite direction when the driving member positively connected to the sighting means adjusting gear is operated and the other driving member is held sta tionary.

RICHARD SCHURMANN. 

